Shuffle-induced modulated structure and heating-induced ordering in the metastable β-titanium alloy, Ti-5Al-5Mo-5V-3Cr. (February 2020)

• Record Type: Journal Article
• Authors: Zheng, Yufeng; Antonov, Stoichko; Feng, Qiang; Banerjee, Rajarshi; Banerjee, Dipankar; Fraser, Hamish L.
• Is Part Of: Scripta materialia. Number 176(2020)
• Page Start: 7
• Page End: 11
• Publication Date: 2020-02
• Subjects: Titanium alloys -- Modulated structure -- Ordering -- High resolution transmission electron microscopy -- Atom probe tomography; Materials -- Periodicals; Metallurgy -- Periodicals; Metalen; Legeringen; Materiaalkunde; Metals, metalworking and machinery industries; Metals; Electronic journals; 620.11
• DOI: 10.1016/j.scriptamat.2019.09.027
• Languages: English
• ISSNs: 1359-6462

Abstract

Abstract: A nano-scaled shuffle-induced modulated structure and heating-induced ordering have been characterized in a metastable β-titanium alloy, Ti-5Al-5Mo-5V-3Cr, and their inter-relationship was investigated through in-situ and ex-situ conventional and aberration-corrected scanning/transmission electron microscopy and atom probe tomography. The nano-scaled O′ phase with a disordered orthorhombic-modulated structure formed by the { 011 } < 01 1 ¯ > β transverse phonon was characterized for the first time to be stable from room temperature to ∼200 °C. The O″ phase with an ordered orthorhombic structure formed from the β phase during aging above the O′ phase solvus temperature, where Al segregation in nano-scaled regions led to ordering of every third {011} planes. Graphical abstract: Image, graphical abstract